You may use the following method to disable the Password Policy settings in the Default Domain Policy. I do not recommend this for a production network, which should use a password policy, but it may be used in a home lab.
GPO Path: Computer Configuration/Policies/Windows Settings/Security Settings/Account Policies/Password Policy
GPO Settings: Enforce Password History/0
GPO Settings: Maximum Password Age/0
GPO Settings: Minimum Password Age/0
GPO Settings: Minimum Password Length/0
GPO Settings: Password must meet complexity requirements/Disabled